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Marketing or advertising agency companies in the Slough area

243 marketing or advertising agency companies have a registered office in the Slough area (SL postcodes), and 77 of them were formed in 2025 or 2026. In their latest accounts, the typical one held £50,895 in cash and owed £28,674 at year end.

Companies House register, 1 September 2026, and accounts filed in the last twelve months. Compared with the official category “Advertising agencies” (SIC 73110). Covers companies with a registered office in SL postcodes.

The numbers

Marketing or advertising agency companies in the Slough area (SL postcodes) compared with the same category across the UK. Typical figures are medians.
MeasureSloughUK
Registered companies24333,083
Formed in 2025 or 202677 (32%)33%
Being struck off or in liquidation26 (11%)9.2%
Typical cash at year end£50,89547 accounts£17,802
Typical amount owed at year end£28,674117 accounts£14,687
Typical number of employees1115 accounts1

What this means if you’re starting one

Most of your competition will be other newcomers

32% of the 243 marketing or advertising agency companies in the Slough area (SL postcodes) were formed in 2025–26, against 21% of all companies in the Slough area (SL postcodes). Nationally, that share of new companies is higher than 92% of UK industries.

New rivals are arriving faster than in most trades, so your customers already have fresh options. Being new is not a difference on its own.

Most of these businesses are run by one or two people

The typical marketing or advertising agency company in the Slough area (SL postcodes) reports 1 employee; the top quarter has 2 or more (115 filings).

You are mostly up against owner-operators. Your own hours are likely to be your biggest cost, and the easiest one to undercount.

You can start without much equipment

The typical marketing or advertising agency company in the Slough area (SL postcodes) carries £1,534 of equipment and other fixed assets after depreciation, lower than 94% of UK industries.

Most of the cost of entry is time and running costs rather than kit, so a small test is cheap.

Planning a business like this in Slough?

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What these figures can’t tell you

Companies are counted where their registered office is, which may be an accountant or a home address rather than a shop. Sole traders and partnerships are not on the register, and electronically filed accounts cover roughly 60–75% of accounts filed each year. The figures describe companies that exist; they cannot prove demand for your idea or predict whether it will work. How the figures are built.

Marketing or advertising agency in other places

Other businesses in Slough

All business benchmarks in Slough